How many orcs is reasonable?

Im currently running a game using the dragon of icespire peak. The players are about to do the shrine of savras quest, and the book says that i should place 4 orcs per character, the problem is i have about 7 players, so that adds up to 28 orcs. Im unsure if this is too insane or to hard to handle during play. Whats a reasonable amount of orcs?