JJ facing < 1/2 pot donk on A high flop

[Wish]

Poker Stars
4/180 No Limit Holdem Tournament
Blinds: t50/t100
9 players
Converter

Stack sizes:
UTG: t2565
UTG+1: t3725
MP1: t7520
Hero: t1935
MP3: t1400
CO: t2165
Button: t4100
SB: t3795
BB: t2360

Pre-flop: (9 players) Hero is MP2 with J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img]
3 folds, <font color="#cc0000">Hero raises to t300</font>, 4 folds, BB calls t200 <font color="aaaaaa">(pot was t450)</font>.

Flop: 7[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/heart.gif[/img] (t650, 2 players)
<font color="#cc0000">BB bets t300</font>, Hero folds.
Uncalled bets: t300 returned to BB.

Results:
Final pot: t650

Standard fold here? Villain's bet is less than 1/2 pot. How often is he holding an ace? I've got hand history on villain (36/10/1 over ~80 hands), but most of it's from some other tournament and I don't remember him, nor have we been sitting together long enough to have a solid read here.