This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 宺 is uncertain. It visually contains 宀 (roof) and a lower part that may be a variant of 川 or 儿 with 口, but no clear origin is known.
With no clear meaning, picture a mysterious room under a roof 宀 where the walls are made of flowing rivers 川 and a mouth 口 whispers secrets.
For コウ, imagine a koala (コアラ) sitting under the roof 宀, but the koala is just a vague shape: コウ is the sound of its soft call.