Anyone estimated total internal floor space vs. habitable/liveable floor space on the B'rel-class Bird-of-Prey (~110m version)?

Small crew (12–36) but full of warp core, cloaking device, engines, and weapons. How much space is actually usable by the crew vs. taken up by systems?

For comparison:

WW2 Gato-class Submarine:

• Total internal floor space: ~5,000 sq ft
• Machinery, engines & batteries: ~70%
• Torpedoes & weapons storage: ~10%
• Liveable floor space: ~1,000 sq ft (for ~85 crew who hot-bunked)
• Main control room / bridge: ~300 sq ft

There are deck plans in the Haynes manual, and at least 3 games have walkable 3D maps (Generations, Klingon Honor Guard, Elite Force)

It's about the same size as ... me.
View attachment 54574

What is Kirk doing to that poor cloaking device???!!!???

Have no fear, Sargon is here.

Oh! The pain!
My spheres are feeling very delicate today!