PV=nRT and lift

No.10023045 ViewReplyOriginalReport
so perhaps I'm just retarded but I've got a simple question
a dirigible works by having lower density inside the airbags than outside of them providing natural bouyancy
would it be possible to generate more lift by replacing the cloth and rubber bags with steel containers and reaching the same pressure with less volume?
the density is found (in short) as n/V and raising T actually produces more lift so if