I've never seen a 575v motor either. If the rest of the machine is 220v, I'd swap out the motor as well. Now, lets talk transformers.
Going from the numbers listed in post 1, 575v and 2.1amps gives you a draw of 1207.5 watts. This gives you your secondary output requirements and what you need to have going into your primary side. Since we know the primary side has 220v, if you divide your wattage by 220, you find you need an input current of 5.4886amps or a bit more for losses, kind of like prop slippage. Now that we know how much power is going to run through the transformer, we need to determine the turns ratio, what steps the voltage up or down from one side to the other. To determine this, you divide the higher number, 575, by the smaller, 220. Since the 220 is smaller, it will be referred to as 1 and listed first since it's the primary side. The secondary side, listed second, will use the quotient of the input and output voltages, in this case being 2.613. This means that you will need a transformer with a minimum rating of 1225 to 1250 watts with a turns ratio of approximately 1:2.62
One thing I forgot. If you can't find a transformer that will meet your needs exactly, you can go with a slightly higher ratio but never go lower. Going with a lower ratio will increase the amperage to the motor and could burn it out
