Number of bins

Using ppc_rootogram is there any argument to indicate the number of bins? In this case I’m working with the number of stems which can be up to 1750 stems and with the actual number of bins I’m not able to see the pattern of the observations (see figure below).
Thanks in advance,

add_mod <- glmmTMB(
  n.stems ~ log(n.stems0) + census.interval + + abs.dis.real.ACG + abs.dis.real.TMCG,
  data = fs, family = nbinom1

ppc_rootogram(fs$n.stems, t(as.matrix(simulate(add_mod, 100))))