that's going to be tight I would do a min of 2.5 cu/ft per sub with a min of 80 sq/in of port... here you go let me know if you want a drawing... (and I'm pretty sure there is a different section for this;)
Net Volume: 5.15 cu/ft
Tuning Freq: 35.11 Hz
Port Area: 82.50 sq/in
Box Width: 40.00...