5/10 AA on a draw heavy flop

[WebGuySteve]

I appologize in advance if this hand is standard, I am very new to NL ring, and would love your opinions on this hand:

It is fron 5/10 9 handed on bodog. I have roughly 2K in front of me and villain has roughly 1500 in front of him. My only read is that villain is very TAG, and will bluff if need be, but isn't calling without a very good holding.

Preflop: Villain raises to 35, I reraise to 100 with AA, villain calls.

Flop: 5 [img]/images/graemlins/heart.gif[/img] 6 [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/spade.gif[/img] Villain checks, I bet 150, villain raises to 400, hero...? At this point Villain has roughly 1000 behind.