Hi,
TRK-MPC5606B is supplied by 5V only, it's not configurable to 3.3V. So, there's no problem, you can connect a transceiver supplied by 5V.
The microcontroller itself supports both 3.3V and 5V supply voltage.But if 3.3V is used, the GPIO pins are not 5V tolerant.
Regards,
Lukas