This is exactly what the problem is.
Volvos are more prone to this condition than other cars.
Although, I worked on many non-Volvos with same problem.

Basically, you have no compression, and your pistons / cylinder walls
are bone dry. Engine will not fire.
As Don suggests, put a bit of motor oil in each cylinder (after
removing spart plugs), remove fuel pump fuse, and crank the engine
for a short while to coat the pistons with oil.
Next, put the plugs and the fuse back in, and try to start.
It will struggle for a bit, but will soon catch. It will run rough,
and smoke like heck. Your neighbors may even call the fire department...
After 15 minutes it will all clear out, and run perfectly.
Schedule thye oil change ASAP.