I'm just taking a guess, this isn't based on any data that I received from admissions, but if Fall 2006 was 446 just at Washington Square, I would imagine that classrooms and such can handle ABOUT this much. So with the additional capacity and resources at Westchester, one could hypothesize that this # would be more. Again, this is only guess.
Also, I found somewhere online in the Fall of 2007 was 370 students, so there's nothing to say that it will be exactly 440ish.