In 1994 Brazil hosted the Women World Championship and in 1995 Brazil hosted one pool of the World Grand Prix.
In 2002, Brazil was supposed to host the Women's World Championship but due to the lack of infrastructure of the Brazilian Gymnasiums, the Brazilian Federation gave up and then Germany was chosen.
I guess the problem with Brazil is the lack of infrastructure in the Gymansiums, after the Pan-Am Games we have more infrastructure. Anyway, if some Asian countries can host the WGP, I don't see why Brazil doesn't have infrastructure to host international FIVB events. Our gymnasiums are not that bad!