AK in a 3bet pot

[Aceium]

This is my second hand at the table, so I don't have an image yet and I don't have information on my opponent.

PokerStars No-Limit Hold'em, $0.02 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero ($4.98)
BB ($1.03)
UTG ($0.57)
MP ($2.64)
CO ($7.51)
Button ($3.21)

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Button raises to $0.14</font>, <font color="#CC3333">Hero raises to $0.4</font>, <font color="#666666">1 fold</font>, Button calls $0.26.

Flop: ($0.82) J[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $0.75</font>, <font color="#CC3333">Button raises to $1.5</font>

I'm kind of at a loss as to what all the merits are to my possible plays. I don't see folding as a great option. I could just call but I don't see what my play would be on any turn card except an A or K. So raise?