Heat a large nonstick skillet over medium-high heat. Add sausage to pan; sauté 1 minute. Add onion and bell pepper to pan; sauté 4 minutes. Stir in garlic, black pepper, and saffron; sauté 1 minute. Stir in rice, 3/4 cup water, marjoram, tomatoes, and clam juice; bring to a boil. Cover, reduce heat, and simmer 4 minutes or until rice is almost tender. Stir in shrimp. Cover and simmer 3 minutes or until shrimp are done.