Party $33 - AKo with 18bb's behind UTG raise

[otctrader]

Party $33, Blinds 75/150 6-handed, stacks rounded off

BB 600
SB 500
BTN 300
CO 1400
UTG+1 2800 <--- me with AKo
UTG 2400 <--- villain, raises to 450

UTG seems solid, range something like 99+,AT+ and somewhat aggressive, so folding equity is dubious if he's holding a pair

I'm usually autoshoving here, but may have found a leak. If you assume zero FE and treat the UTG raise as all-in, ICM has it as a fold by over 4%.

Do I have any other reasonable options here given stack size distribution?