25NL - Weird spot w/ AK probably easy

[zacd]

villain is 9.57/5.22/2.83 over 115 hands according to PT but at the time of this hand I had him at like 18/13/2.4 fwiw.
How should I treat his reraise preflop? He would also 3-bet me very small as well -- ie I would raise to $1 and he would reraise to $2.25.

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $24.80
<font color="black">Hero (BB): $27.60</font>
UTG: $24.90
MP: $17.90
CO: $28.20
BTN: $21.10

<font color="black">Preflop:</font> Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
2 folds, <font color="red">CO raises to $1.00</font>, 2 folds, <font color="red">Hero raises to $4.00</font>, <font color="red">CO raises to $7.00</font>, Hero calls $3.00

<font color="black">Flop:</font> ($14.10) 2[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] 2[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets $9.00</font>, Hero folds

Pot Size: $23.10 ($0.70 Rake)