Amount of dough for 9x5 loaf pans ?

Hello to all,

My 2 recent attempts at making the popular Rustic Bread as batards

risen on canvas both turned out as flat as ciabatta,

and also required too much time and work ( but was delicious )

I want to try the same recipe in loaf pans which hold 6 cups

to the rim. How much dough should I put in each ?

Also I have aluminium, steel ,and glass pans- much difference ?

Thanks