There are 4 countries in the world that use 380V (400 nominal) and 60Hz; Brazil, South Korea, Peru and Trinidad/Tobago.
Korean exporters tend to know better, but what happens a lot is that Brazilian exporters do not pay attention to details on used equipment (or don't care), so people in other countries buy surplus machinery from Brazil and it arrives with these relatively oddball motor voltages, oddball in that they do not work well for the rest of the world.
A motor provides torque based on a direct relationship to the ratio of voltage and frequency it was designed for, typically +-10%. So a motor designed for 380V 50Hz is a ratio of 7.6:1, a motor designed for 460V 60hz is also a ratio of 7.67:1, so virtually identical. Even if a motor is designed for 400V 50Hz, that's 8:1 but still within the range of acceptability for a 480V 60Hz supply as we have here in the US. That means motors with those combinations, even with variations within tolerances, are going to work fine in either place, other than the difference in speed.
But a motor designed for Brazil's 380V 60Hz supply (possibly with a nameplate voltage of 400V 60Hz), is operating on a ratio of 6.67:1, which is well below the -10% range of acceptability for a 480V supply. But 480V is the current standard for the US, 440V is no longer our standard but might be somewhere else. If you TRULY have a 440V 60Hz supply, you are right on the ragged edge of acceptability as far as the V/Hz ratio is concerned. 440V 60Hz is 6.6 V/Hz, the motor is designed for 6.67 V/Hz, so it should work, but will be a little weak on torque. So if your motor is running fully loaded all of the time, I might be concerned. If your motor is only loaded at 75-80% as many are, I would not worry about it.
All that said, a more careful examination of the actual motor nameplate and what you REALLY have as a supply voltage is definitely in order here, guessing and assuming is asking for trouble.
