50NL: AK Flop Decision 40bb Effective Stacks

[Snafu'd]

This one may be simple. No reads on the guy so I'm not sure if he's lost money or bought in short.

Full Tilt Poker, $0.25/$0.50 NL Hold'em Cash Game, 4 Players
LeggoPoker.com - Hand History Converter

BTN: $55.85
Hero (SB): $84.65
BB: $20.50
UTG: $58.65

Pre-Flop: A[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img] dealt to Hero (SB)
UTG folds, <font color="red">BTN raises to $1.75</font>, <font color="red">Hero raises to $5.75</font>, BB calls $5.25, BTN folds

Flop: ($13.25) 6[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="blue"> Hero... </font>