NLTRN 200 - Top pair mid kicker on dry board vs. Fishy villain

[xSCWx]

The villain has shown down hands with air before, but he made ~2/3PSB bets and went through the hand slowly. In this one he instapotted both the flop and the turn. His general playstyle seemed to be between average and loose/passive.

Full Tilt Poker $200 + $10 Heads Up Sit & Go
Table 1 - 15/30 - No Limit Hold'em

Seat 1: Villain (1,620)
Seat 2: Hero (1,380)

*** HOLE CARDS ***
Dealt to Hero [7[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/diamond.gif[/img]]
Hero raises to 90
Villain calls 60

*** FLOP *** [3[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img]]
Villain bets 180
Hero calls 180

*** TURN *** [3[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img]] [Q[img]/images/graemlins/heart.gif[/img]]
Villain bets 540
Hero ???

I called but I wasn't sure what to put him on besides air or another ace.

[Vinetou]

I always call here and I am always wrong. I wouldn't be surprised if he showed 42 here.

[tmcdmck]

at times like this i always check their sharkscope. the more negative it is, the more i am calling.