50NL TPTK in limped pot

[nogenius]

PokerStars No-Limit Hold'em, $0.50 BB (3 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Button ($61.80)
SB ($24.40)
Hero ($66.10)

Preflop: Hero is BB with A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/heart.gif[/img].
Button calls $0.50, SB completes, Hero checks.

Flop: ($1.50) 6[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets $1.25</font>, Button calls $1.25, <font color="#CC3333">SB raises to $5</font>, <font color="#CC3333">Hero ???</font>

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Villian is 55/16/1 over about 60 hands.

What's your play here and why?