Building my first box

[Mopowered2011]

How yall doin, building my first box for my 2011 dodge ram QC that'll be replacing my center console.

Specs are

Width 15", Height 20.75" x Depth 38" = 5.4829 cu/ft

Port size is (Internal specs)

13.5" W x 5" H x 26" D for a displacement of 1.01563 cu/ft

Drivers Displacement are .198 cu/ft

I believe its final volume should be 5.4829 - 1.1563 - .198 = 4.1286 cu/ft

Please correct me if im wrong here, i believe this will be tuned to roughly 32hz (should come in a lil lower like 31.8hz or so)